Hybrid Cubemap Projection for 360-Degree Video Coding

4. The method of claim 2, wherein the first projection format and the second projection format comprise at least one of a cubemap (CMP) format, a uni-cube map projection (UNICMP) format, an adjusted cube map projection (ACP) format, or an equi-angular cubemap projection (EAC) format.

5. The method of claim 2, wherein the first projection format indication comprises an index value associated with a preconfigured projection format.

6. The method of claim 2, wherein the first projection format indication and the second projection format indication are received at a sequence level.

10. The decoding device of claim 9, wherein the processor is further configured to obtain a first projection format indication that indicates a first projection format is associated with the first face and a second projection format indication that indicates a second projection format is associated with the second face, the first projection format being different than the second projection format.

11. The decoding device of claim 9, wherein the processor configured to perform the at least one decoding process on the first face using the first transform function is further configured to perform a geometry padding of reference samples of the first face based on the first transform function.

12. The decoding device of claim 9, wherein the first transform function and the second transform function are obtained at a sequence level.

14. The decoding device of claim 13, wherein the horizontal transform function coefficient and the vertical transform function coefficient for the first face are received at a sequence level.

16. The decoding device of claim 15, wherein the at least one decoding process comprises performing a geometry padding of reference samples of the face.

17. The decoding device of claim 15, wherein the horizontal transform function coefficient and the vertical transform function coefficient for the face are received at a sequence level.